ISWALNUM(3)		   Linux Programmer's Manual		   ISWALNUM(3)



NAME
       iswalnum - test for alphanumeric wide character

SYNOPSIS
       #include <wctype.h>

       int iswalnum(wint_t wc);

DESCRIPTION
       The  iswalnum()	function is the wide-character equivalent of the isal-
       num(3) function.	 It tests whether wc is a wide character belonging  to
       the wide-character class "alnum".

       The  wide-character  class  "alnum" is a subclass of the wide-character
       class "graph", and therefore also  a  subclass  of  the	wide-character
       class "print".

       Being  a subclass of the wide-character class "print", the wide-charac-
       ter class "alnum" is disjoint from the wide-character class "cntrl".

       Being a subclass of the wide-character class "graph", the  wide-charac-
       ter class "alnum" is disjoint from the wide-character class "space" and
       its subclass "blank".

       The wide-character class "alnum" is disjoint  from  the	wide-character
       class "punct".

       The  wide-character  class  "alnum"  is the union of the wide-character
       classes "alpha" and "digit".  As such, it also contains the  wide-char-
       acter class "xdigit".

       The  wide-character  class "alnum" always contains at least the letters
       'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.

RETURN VALUE
       The iswalnum() function returns nonzero	if  wc	is  a  wide  character
       belonging  to  the wide-character class "alnum".	 Otherwise, it returns
       zero.

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       +-----------+---------------+----------------+
       |Interface  | Attribute	   | Value	    |
       +-----------+---------------+----------------+
       |iswalnum() | Thread safety | MT-Safe locale |
       +-----------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

NOTES
       The behavior of iswalnum() depends on the LC_CTYPE category of the cur-
       rent locale.

SEE ALSO
       isalnum(3), iswctype(3)

COLOPHON
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       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       https://www.kernel.org/doc/man-pages/.



GNU				  2015-08-08			   ISWALNUM(3)